CN213974522U

CN213974522U - Vertical fin box section test support dummy and test equipment

Info

Publication number: CN213974522U
Application number: CN202022285515.4U
Authority: CN
Inventors: 刘传军; 李星; 张田; 季少华; 李东升
Original assignee: Commercial Aircraft Corp of China Ltd; Beijing Aeronautic Science and Technology Research Institute of COMAC
Current assignee: Commercial Aircraft Corp of China Ltd; Beijing Aeronautic Science and Technology Research Institute of COMAC
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-08-17
Anticipated expiration: 2030-10-14

Abstract

The utility model discloses a test support dummy for a vertical tail box section and test equipment, which relate to the field of aviation manufacturing. The vertical tail box section supporting dummy is fixed on the upper wall end, and includes: a plurality of supporting dummy frames, which are connected to the corner boxes and fixed on the upper wall end through a plurality of frames; the supporting dummy skin covers the plurality of supporting dummy parts On the frame, the middle part of the skin of the support dummy is provided with a support dummy and a vertical tail connection area; a plurality of skin connection belt plates are located on both sides of the support dummy skin along the aircraft course, and are connected to the support dummy Skin and upper wall ends. The technical scheme of the utility model designs a test support dummy for the vertical tail box section based on the rear fuselage structure of the real aircraft, so as to ensure that the connection relationship between the vertical tail and the rear fuselage remains unchanged; the transmission between the support dummy and the vertical tail box section is adjusted through reasonable stiffness design load ratio, which more realistically simulates the support of the rear fuselage to the vertical tail box section. Therefore, the solution of the present application can be applied to various loading methods such as static force, fatigue & damage tolerance.

Description

Vertical fin box section test support dummy and test equipment

Technical Field

The utility model relates to an aviation field of making, concretely relates to false piece of experimental support of vertical fin box section and test equipment.

Background

For the modern civil aircraft structure, the connection relation between the vertical fin and the rear aircraft body is complex, and the shearing force and the bending moment are high in load transmission. A typical fuselage-tail attachment scheme for a civilian aircraft is shown in fig. 1. The root of the vertical fin is connected with the machine body through a plurality of pairs of joints, and the bending load of the vertical fin is transferred through pulling and pressing; meanwhile, the root of the vertical fin is connected with a wall plate of the machine body through a high-lock bolt, and the shear force and the torque of the vertical fin are transmitted through shearing. When a vertical tail box section test is carried out, the connection and the support of the rear machine body to the vertical tail box section need to be designed in a key mode so as to truly simulate the boundary condition of the vertical tail box section.

The vertical tail box test can be supported by a rear machine body or a dummy piece. The boundary condition supported by the rear fuselage is real, but the cost is high, and the cylinder section of the rear fuselage needs to be reinforced to meet the test requirements (considering environmental factors and fatigue load amplification factors). The vertical tail box section test carried out by adopting the supporting dummy piece has the advantages of low cost, strong designability, small test field and the like, and the connection and the force transmission between the vertical tail and the rear machine body can be simulated really through reasonable design, so that the vertical tail box section test is an optional test scheme.

In the prior art:

1)201310652040. X/A tail load applying device for structural strength test of airplane (see FIG. 2). The patent provides a tail load applying device capable of effectively simulating the stress condition of a tail in an airplane structural strength test. Different loads are applied to the test piece through the change of the loading cross beam and the form of the connecting lug perpendicular to the surface of the empennage dummy platform.

This patent is different from the proposed patent in its applicable objects. The proposal patent simulates the support and connection of the rear machine body to the vertical tail box section, and is suitable for the vertical tail box section test and the vertical tail/rear machine body connection area test.

2) 201520196320.9/an aircraft vertical fin static test support (fig. 3). The patent provides an aircraft vertical fin static test supporting piece, including parts such as upper and lower bottom plate, deep floor, groove section bar and erection joint. This patent adopts the false piece of frame-type to support and connect vertical fin box section, and is different from the scheme of proposal patent. The proposal patent designs a supporting dummy piece based on a real rear machine body structure, thereby more truly simulating the support of the rear machine body on the vertical tail box section.

3) 201810842763.9/adjustable rigidity support system for testing connection strength of vertical stabilizer and fuselage of airplane (figure 4), 201810842783.6/support device for testing connection strength of vertical stabilizer and fuselage of airplane, 201810845691.3/support system for testing connection strength of vertical stabilizer and fuselage of airplane.

The relevant units/persons applied for 3 similar patents, one of which was analyzed. The patent provides an adjustable rigidity support system for a connection strength test of a vertical stabilizer and a fuselage of an airplane, which comprises two groups of symmetrically arranged variable rigidity rod systems, connecting plates, joints and other components. The patent simulates the connection constraint condition of the vertical stabilizer and the fuselage of the airplane, and tests the ultimate bearing capacity and the failure mode of the connection joint.

The patent adopts a dummy piece of a rod system structure to support and connect the vertical tail box section, which is different from the proposal of the proposal patent. The proposal patent designs a supporting dummy piece based on a real rear machine body structure, thereby more truly simulating the support of the rear machine body on the vertical tail box section.

4) US 8,267,352B 2/Structure of the Load Introduction Zone in the reader End of an air Aircraft (FIG. 5). The patent designs a load application scheme of a tail section of a fuselage, which comprises a horizontal tail load application scheme and a vertical tail load application scheme. The load transmission of the vertical tail and the horizontal tail to the rear machine body is simulated by designing a test dummy piece so as to carry out test on the rear machine body structure.

In connection with the above description and analysis of the prior art solutions, the prior art solutions have the following features/disadvantages:

1) the related patents in fig. 2, 5 are only applicable to rear fuselage structure loading and test testing;

2) for the related patents in fig. 3 and 4, the test dummy is designed by adopting structures such as a frame, a rod system and the like, and the support of the rear fuselage on the vertical tail box section is simulated;

3) the connection relation between the vertical fin and the rear machine body is complex, and the vertical fin and the rear machine body not only comprise a plurality of pairs of connecting joints for transmitting tension and compression loads caused by bending moment, but also comprise a plurality of high-lock bolts for transmitting shearing force and torque. The force transfer between the vertical fin and the rear fuselage is not only related to the connecting fastener, but also closely related to the rigidity of the fuselage skin, frame and other supporting structures. Although the related patents in fig. 3 and 4 try to truly reflect the connection relation and force transmission of the vertical fin and the rear fuselage through the dummy structure of the frame and the rod system, the load of the connecting joint and the high-locking bolt is difficult to be completely consistent with the structure of a real airplane.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a false piece of experimental support of vertical fin box section and test equipment. The technical scheme of the utility model designs the supporting dummy part for the vertical tail box section test based on the real airplane rear body structure, and ensures that the connection relation between the vertical tail and the rear body is unchanged; the load transmission proportion of the supporting dummy piece and the vertical tail box section is adjusted through reasonable rigidity design, so that the supporting of the rear machine body on the vertical tail box section is simulated really. Therefore, the scheme of the application can be applied to various loading modes such as static force, fatigue and damage tolerance and the like.

According to the utility model discloses an aspect provides a false piece is supported to vertical fin box section, support the false piece and be fixed in the upper wall and serve, its characterized in that, support the false piece and include:

the plurality of dummy supporting frames are connected with the corner boxes through the plurality of frames and are fixed on the upper wall end;

the supporting dummy piece skin covers the plurality of supporting dummy piece frames, and a supporting dummy piece and vertical tail connecting area is arranged in the middle of the supporting dummy piece skin;

and the skin connecting belt plates are positioned on two sides of the skin of the supporting dummy part along the course of the airplane and connected to the skin of the supporting dummy part and the upper wall end.

Furthermore, the top of the supporting dummy piece frame is arc-shaped, and the supporting dummy piece skin completely covers the top of the supporting dummy piece frame.

Further, the number of the supporting dummy frames is 3.

Furthermore, the skin connecting belt plates are symmetrically arranged on two sides of the skin of the supporting dummy piece along the course of the airplane, avoiding the frame edge strips of the supporting dummy piece frame.

Furthermore, the skin connecting band plate comprises a first side plate and a second side plate, one sides of the first side plate and the second side plate are connected, one or more connecting ribs are arranged between the first side plate and the second side plate, and the included angle is larger than 90 degrees; the first side plate is fixed on the supporting dummy piece skin, and the second side plate is fixed on the upper wall end.

Furthermore, a plurality of fixing holes are formed in the first side plate and the second side plate of the skin connecting belt plate respectively, the first side plate is fixed to the supporting dummy piece skin through a fastener, and the second side plate is fixed to the upper wall end through a fastener.

Further, the manner of fixing the first side plate and the second side plate of the skin connecting strip plate to the supporting dummy member skin and the upper wall end includes, but is not limited to, welding and gluing.

Furthermore, the number of the skin connecting belt plates is 8, and 4 skin connecting belt plates are symmetrically arranged along two sides of the supporting dummy piece skin respectively.

Furthermore, the frame connection corner box comprises a plurality of first frame connection corner boxes and a plurality of second frame connection corner boxes, the first frame connection corner boxes are arranged on two sides of the supporting dummy piece frame, and the second frame connection corner boxes are arranged in the middle of the supporting dummy piece frame.

Furthermore, one side of the first side plate and one side of the second side plate of the first frame connecting angle box are connected, one or more connecting ribs are arranged between the first side plate and the second side plate, and the included angle is 90 degrees; the first side plate is fixed on the dummy support frame, and the second side plate is fixed on the upper wall end.

Furthermore, the first side plate of the second frame connecting corner box is vertically arranged on the plane of the second side plate, and one or more connecting ribs are arranged between the first side plate and the second side plate; the first side plate is fixed on the dummy support frame, and the second side plate is fixed on the upper wall end.

Furthermore, the second frame connecting angle boxes are arranged in pairs and are respectively positioned at the front side and the rear side of the dummy support frame along the course of the airplane.

Furthermore, a plurality of fixing holes are formed in the first side plate and the second side plate of the frame connection corner box respectively, the first side plate is fixed to the supporting dummy frame through a fastener, and the second side plate is fixed to the upper wall end through a fastener.

Further, the first side plate and the second side plate of the frame connecting corner box are fixed on the supporting dummy frame and the upper wall end by means of welding and gluing.

Further, the number of the frame connecting corner boxes is 6.

According to the utility model discloses a second aspect provides a vertical fin box section test equipment, test equipment adopts according to above arbitrary aspect vertical fin box section support dummy, it is served to be fixed in the upper wall to support dummy to be connected with vertical fin test piece root.

Furthermore, the upper wall end is connected with a bearing wall or a ground clamp to play a role in fixing and supporting the dummy part and the vertical tail test part.

The utility model has the advantages that:

1. the utility model has the technical proposal that the false supporting piece for the vertical fin box section test is designed based on the real rear machine body structure, thereby ensuring that the connection relation between the vertical fin and the rear machine body is unchanged;

2. the supporting dummy piece of the technical proposal of the utility model has stronger designability, and can meet the test requirements of the static force, fatigue and damage tolerance of the vertical box section through reinforcement; the load transmission proportion of the supporting dummy piece and the vertical tail box section is adjusted through reasonable rigidity design, and the supporting of the rear machine body on the vertical tail box section can be simulated really.

Drawings

The above features or advantages of the present invention will become apparent and more readily appreciated when considered in connection with the following drawings, in which:

FIG. 1 is a typical prior art rear fuselage-vertical tail attachment scheme for a civilian aircraft;

FIG. 2 is a prior art tail load applying assembly;

FIG. 3 is a prior art vertical tail static test support for an aircraft;

FIG. 4 is a prior art adjustable stiffness support system;

FIG. 5 is a prior art tail load applying assembly;

fig. 6 is a schematic view of a connection relationship between a supporting dummy member and a vertical fin according to an embodiment of the present invention;

fig. 7 is a schematic view of a support dummy assembly according to an embodiment of the present invention;

FIG. 8 is a schematic view of a connection between a support dummy skin and an upper wall end according to an embodiment of the present invention;

FIG. 9 is a schematic view of a support dummy skin attachment strap in accordance with an embodiment of the present invention;

fig. 10 is a schematic view of the connection of a false support frame and an upper wall end according to an embodiment of the present invention;

FIG. 11 is a schematic view of a connection corner box of a dummy support frame according to an embodiment of the present invention

Fig. 12 is a schematic view of a vertical test scenario for a vertical tail box according to an embodiment of the present invention;

fig. 13 is a horizontal version of the vertical fin box test according to an embodiment of the present invention;

fig. 14 is a flow chart of preparation of a vertical fin box section test support dummy according to an embodiment of the present invention;

fig. 15 is a schematic view of an intercepted fuselage section of a support system according to an embodiment of the invention.

Detailed Description

The following describes embodiments of the present invention with reference to the accompanying drawings. The same or similar reference numbers in the drawings identify the same or similar structural features throughout.

In addition, the embodiments of the present invention described below with reference to the drawings are exemplary and are only used for explaining the embodiments of the present invention, and do not limit the present invention.

In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "left", "right", "vertical", "horizontal", "inner", "outer", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.

The utility model relates to a false piece of experimental support of vertical fin box section and test equipment. The supporting dummy piece is designed based on a real rear machine body structure and comprises a supporting dummy piece body, a supporting dummy piece skin, a frame and an upper wall end.

The 'supporting dummy piece', namely the vertical tail test supporting dummy piece, is a device which is used as a 'test bench' or a 'test clamp' and is provided for simulating the connection and the support of the rear fuselage of a real airplane to a vertical tail in the vertical tail box section test and providing support for the vertical tail box section test. So called "dummy", is a rear fuselage that can be considered as a dummy.

Examples

The schematic diagram of the vertical box section test is shown in fig. 6. The supporting dummy piece 1 is connected with the root of the vertical fin test piece 2, and the connection and supporting effect of a real rear machine body on the vertical fin box section is simulated; the skin, frame and other parts of the supporting dummy member 1 are connected with the upper wall end 3 through a corner box, a belt plate and other structures. The upper wall end 3 is usually connected with a bearing wall or a ground clamp and plays a role in fixing and supporting the dummy part 1 and the vertical tail test part 2.

Specifically, the composition of the vertical-fin box section trial buttresses was as shown in fig. 7. Comprises a supporting dummy piece skin 4, a supporting dummy piece and vertical tail connecting area 5, a supporting dummy piece frame 6, a skin connecting belt plate 7 and a frame connecting corner box 8.

The supporting dummy piece skin 4, the supporting dummy piece and vertical tail connecting area 5 and the supporting dummy piece frame 6 are designed based on the rear fuselage structure of the real airplane. The supporting dummy piece and vertical fin connecting area 5 is completely consistent with the rear fuselage/vertical fin connecting area of the real airplane; the supporting dummy piece skin 4 is intercepted from the real back fuselage skin and is adjusted as necessary, and a frame connected with the vertical tail and a frame respectively arranged in front and at the back can be contained along the aircraft course, or the range is selected according to the actual situation; the support dummy frame 6 is cut out from the real rear frame and adjusted as necessary, and may include a frame connected to the vertical tail and one frame in front of and behind the frame along the heading of the airplane, may include the region 1/4 on the upper side of the fuselage along the vertical direction of the airplane, or may be selected according to actual conditions.

Wherein, the skin connecting belt plate 7 and the frame connecting angle box 8 respectively connect the supporting dummy member skin 4 and the supporting dummy member frame 6 with the upper wall end 3 to fix the supporting dummy member 1. The skin connecting strap 7 comprises a plurality of straps, the specific number and connection form depends on the range and configuration of the supporting dummy skin 4; the frame joint corner box 8 comprises a plurality of corner boxes, and the specific number and connection form depend on the range and configuration of the supporting dummy frame 6.

Fig. 8 is a schematic view of a typical arrangement of the skin attachment strap 7. In particular, the support dummy skin 4 is connected on one side to the upper wall end 3 by a plurality (for example 4) of connecting

strips

701, 702, 703, 704, which strips 701, 702, 703, 704, avoiding the area of the frame strip, are connected to the support dummy skin 4 and the upper wall end 3, respectively, by fasteners, welding, gluing or other means. A schematic diagram of a typical structure of the connecting

straps

701, 702, 703, 704 is shown in fig. 9.

The skin connecting strap plates 7 are symmetrically arranged along the other side of the plane of symmetry.

Fig. 10 is a schematic view of a typical arrangement of the frame joint corner boxes 8. Specifically, the supporting dummy frame 6 is connected to the top wall end 3 at one side by a plurality (e.g., 6) of connecting

corner boxes

801, 802, 803, 804, 805, 806, and the connecting

corner boxes

801, 802, 803, 804, 805, 806 are connected to the supporting dummy frame 6 and the top wall end 3 by fasteners, welding, gluing, or other means. A schematic diagram of a typical structure of the

connection corner boxes

801, 802, 803, 804, 805, 806 is shown in fig. 11.

The frame connection corner boxes 8 are symmetrically arranged along the other side of the plane of symmetry.

When the supporting dummy member provided by the patent is used for carrying out a vertical box test, various schemes such as a vertical test and a horizontal test can be adopted, and schematic diagrams are respectively shown in fig. 12 and fig. 13.

The procedure for preparing the vertical box test support dummy is shown in detail in figure 14. The specific steps are as follows:

the method comprises the following steps: a support dummy design input is determined. Inputs to the design of the support dummy include, but are not limited to: a) vertical tails and rear fuselage structures of real airplanes; b) test task books and test design requirements; c) the load transmission between the vertical tail and the rear fuselage of the real airplane comprises the tension and compression load of the connecting joint and the shear load of the high-locking bolt.

Step two: and defining a scheme for connecting the supporting dummy piece and the upper wall end. And defining a connection scheme of a skin, a frame and an upper wall end of the supporting dummy piece according to the selection range of the supporting dummy piece. And respectively adopting skin to connect the belt plate and the frame to connect the corner box to define the connection between the supporting dummy piece and the upper wall end.

Step three: and calculating the load transmission ratio of the supporting dummy piece and the vertical tail. And calculating the load transfer ratio of the supporting dummy piece and the vertical tail according to the connecting scheme of the supporting dummy piece and the upper wall end defined in the step two.

Step four: and evaluating whether the supporting dummy member meets the load transmission requirement. Assessment items include, but are not limited to: a) tension and compression load comparison of the vertical fin/rear machine body connecting joint; b) comparing shearing loads of the high-lock bolts; c) stress/strain comparison of wall plates, beams and metal connecting pieces at the root parts of the vertical tails; d) typical section (especially root section) strain contrast of vertical tails.

Step five: and calculating the strength of the supporting dummy piece. The intensity check terms include, but are not limited to: a) supporting the dummy member for stability; b) bearing dummy stress/strain; c) strength of the brace dummy joint area; d) support dummy fatigue/damage tolerance strength.

Step six: and evaluating whether the supporting dummy piece meets the strength requirement. If the condition is met, the next step can be carried out, and if the condition is not met, the design reinforcement needs to be carried out on the low (negative) margin area.

Step seven: the design scheme of the supporting dummy is frozen and manufactured. The design work is finished.

Therefore, the utility model discloses technical scheme relates to an experimental dummy member of supporting of vertical fin box section and preparation method, wherein:

1) the vertical tail box section supporting dummy piece is designed based on a real rear machine body structure and comprises a supporting dummy piece body structure and a connecting structure for supporting dummy piece skin, a frame and an upper wall end. The supporting dummy piece skin is connected with the upper wall end through a plurality of connecting band plates, the supporting dummy piece frame is connected with the upper wall end through a plurality of connecting angle boxes, and the connecting mode comprises fastener connection, welding, gluing or other modes.

2) When the supporting dummy member of the patent proposal is adopted to carry out the vertical tail box section test, the mode of the integrated design of the supporting dummy member and the vertical tail box section is adopted, and various schemes such as a vertical test and a horizontal test can be adopted.

3) The preparation method of the vertical tail box section test supporting dummy piece comprises the steps of defining a scheme for connecting the supporting dummy piece and the upper wall end, calculating the load transmission ratio of the supporting dummy piece and the vertical tail, checking the strength of the supporting dummy piece and the like.

While embodiments of the present invention have been described and illustrated above, the above embodiments are exemplary and should not be construed as limiting the present invention. To the technical field of the utility model technical personnel, do not deviate from the utility model discloses under the prerequisite of embodiment, can also make a plurality of simple changes, modification, replacement and variant, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. a vertical tail box section test supporting dummy, the supporting dummy is fixed on the upper wall end, it is characterized in that, the supporting dummy comprises:

A plurality of supporting dummy frames are connected to the corner boxes and fixed on the upper wall end through a plurality of frames;

The supporting dummy skin is covered on a plurality of supporting dummy frames, and the middle part of the supporting dummy skin is provided with a connecting area between the supporting dummy and the vertical tail;

A plurality of skin connecting belt plates are located on both sides of the supporting dummy skin along the aircraft course, and are connected to the supporting dummy skin and the end of the upper wall.

2 . The vertical tail box section test support dummy according to claim 1 , wherein the top of the support dummy frame is arc-shaped, and the skin of the support dummy completely covers the top of the support dummy frame. 3 .

3. The vertical tail box section test support dummy according to claim 1 is characterized in that, the skin connecting belt plate is symmetrically arranged along the plane of the support dummy skin to avoid the frame edge of the support dummy frame. Both sides of the heading.

4. The vertical tail box section test support dummy according to claim 3, wherein the skin connecting belt plate comprises a first side plate and a second side plate, the first side plate and the second side plate One side is connected, and one or more connecting ribs are arranged between each other, and the included angle is greater than 90°; the first side plate is fixed on the supporting dummy skin, and the second side plate is fixed on the upper wall end.

5. The vertical tail box section test support dummy according to claim 1, wherein the frame connection corner box comprises a plurality of first frame connection corner boxes and a plurality of second frame connection corner boxes, the first frame connection corner box A frame connecting corner box is arranged on both sides of the supporting dummy frame, and the second frame connecting corner box is arranged in the middle of the supporting dummy frame.

6. The vertical tail box section test support dummy according to claim 5 is characterized in that, one side of the first side plate and the second side plate of the first frame connecting corner box are connected, and are provided with each other. One or more connecting ribs with an included angle of 90°; the first side plate is fixed on the support dummy frame, and the second side plate is fixed on the upper wall end.

7. The vertical tail box section test support dummy according to claim 5, characterized in that, the first side plate of the second frame connecting corner box is vertically arranged on the plane of the second side plate, and is arranged between each other. There are one or more connecting ribs; the first side plate is fixed on the supporting dummy frame, and the second side plate is fixed on the upper wall end.

8. A vertical tail box section test equipment, wherein the test equipment adopts the vertical tail box section test support dummy according to any one of claims 1 to 7, and the support dummy is fixed on the upper On the end of the wall, and connect with the root of the vertical tail test piece.

9 . The vertical tail box section test equipment according to claim 8 , wherein the upper wall end is connected with a bearing wall or a ground fixture, and plays the role of fixing the supporting dummy and the vertical tail test piece. 10 .